wedding destroyers

It’s the annual appearance for the following wedding-related question, this time posed by Jamie in Rugby:

I was at a wedding recently, and this reminded me of the thing I always wonder at weddings, which is: has anyone EVER come forward at that point where the registrar/priest asks if anyone knows of a reason why these two may not be wed?

It seems like a bastardly thing to do – you would have thought if someone had inside knowledge, they might have piped up sooner – but has it ever actually happened?

Readers, have you ever witnessed this mythical event? Part of me would love to see such a spectacle, but in reality I’m usually fonder of the couple than I am of emotional cataclysms.